This genuine return spring (MPN 05061300) is a small but critical service part for Hatz 1B series engines used in construction and garden machinery. Made from durable steel and formed as a coiled spring with hooked ends, it provides the controlled tension needed for smooth, reliable operation of throttle and governor linkages. Correct spring tension helps the engine return consistently to idle and prevents stickiness in the controls. Designed to match the specification of Hatz 1B20 and 1B30 engines (also suitable for 1B50), it is a direct-fit replacement to restore original performance. It is suitable for plant such as compactors, generators, pumps and other small equipment commonly built by Belle and other manufacturers using Hatz single‐cylinder diesels.

Key Features:
– Genuine part for accurate fit and performance (MPN 05061300)
– Steel construction for strength and long service life
– Maintains correct throttle/governor return tension for stable idle
– Direct replacement to OEM specification to minimise adjustment
– Simple to install with hook ends; reduces machine downtime
– Helps prevent control stickiness and uneven throttle response
– Suitable for Hatz 1B20, 1B30, 1B50 engines used across small plant
– Supports regular maintenance schedules and reliable daily use

Typical Applications:
Used on Hatz 1B engines fitted to compactors, trench rammers, generators, water pumps, pressure washers and other light plant. Ideal for routine servicing where throttle or governor response has weakened, or after linkage repairs. Suitable for site, workshop or fleet maintenance environments.

Also known as:
Throttle bias spring, governor tension spring, engine linkage spring, control lever spring, Hatz 1B series tension spring, Belle engine linkage spring, small engine control spring.

Fits Models:
1B20, 1B30, 1B50

Alternate Part Numbers:
05061300

Product Specifications